Doc: Describe using Qbs Settings dialog to manage settings
Doc: Describe using Qbs Settings dialog to manage settings

Change-Id: Ib96e452ba459be449fdd30edef002bccf51fab3e
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@qt.io>

qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qt-labs/qbs,qt-labs/qbs